执行此操作的***方法是使用 stub实体：仅具有ID值的实体对象：

The best way to do this is by using a stub entity: an entity object that's only got an Id value:

var product = context.Products.First();
var photo = new ProductPhoto { ProductId = product.ProductId }; // Stub
context.Entry(photo).State = System.Data.Entity.EntityState.Deleted;
context.Products.Remove(product);
context.SaveChanges();

如果您知道产品的I​​D您甚至可以仅创建两个存根就可以删除 Product 及其 ProductPhoto 。

If you know a Product's Id you can even delete both the Product and its ProductPhoto by only creating two stubs.